ANSWER WILL MARK BRAINLIEST

question 18

Find the gradient of f(x, y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?